Date: Tue, 03 Sep 2002 21:47:20 +0200 From: "D. Rock" <D.Rock@t-online.de> To: current@freebsd.org Subject: fsck cannot find superblock Message-ID: <3D7511C8.3080306@t-online.de>
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Hi,
with 'uncommon' block sizes fsck seems to have problems finding the
superblock:
# newfs -i 10240 -b 4096 -f 512 /dev/ad1d
Reduced frags per cylinder group from 26208 to 26200 to enlarge last cyl group
/dev/ad1d: 409.6MB (838860 sectors) block size 4096, fragment size 512
using 33 cylinder groups of 12.79MB, 3275 blks, 1312 inodes.
super-block backups (for fsck -b #) at:
32, 26232, 52432, 78632, 104832, 131032, 157232, 183432, 209632, 235832,
262032, 288232, 314432, 340632, 366832, 393032, 419232, 445432, 471632,
497832, 524032, 550232, 576432, 602632, 628832, 655032, 681232, 707432,
733632, 759832, 786032, 812232, 838432
# fsck /dev/ad1d
** /dev/ad1d
Cannot find file system superblock
LOOK FOR ALTERNATE SUPERBLOCKS? [yn] n
If I type 'y' fsck will find an alternate superblock at 16 (not 32, as
printed during newfs). The number of inodes, fragment size don't seem to
have an impact, only block size.
No problems with block size of 8192 though.
Daniel
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